body {
    background: linear-gradient(135deg, #f5f6fa 60%, #e0e7ff 100%);
    min-height: 100vh;
    font-family: 'Noto Sans SC', Arial, sans-serif;
}
.account-container {
    max-width: 800px;
    margin: 40px auto;
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
    padding: 36px 36px 40px 36px;
    position: relative;
}
h1 {
    text-align: center;
    color: #3a405a;
    margin-bottom: 30px;
}
.account-form {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    justify-content: center;
}
.account-form input, .account-form select {
    padding: 8px;
    border-radius: 4px;
    border: 1.5px solid #bfc4d6;
    font-size: 1em;
}
#addBtn {
    background: #4f8cff;
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 8px 18px;
    font-size: 1em;
    cursor: pointer;
}
#addBtn:hover { background: #357ae8; }
.account-list {
    margin-top: 20px;
}
.account-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f8f9fa;
    border-radius: 8px;
    padding: 10px 18px;
    margin-bottom: 10px;
    font-size: 1.1em;
}
.account-item .delete-btn {
    background: #e84118;
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 4px 10px;
    cursor: pointer;
}
.account-summary {
    margin-top: 30px;
    font-size: 1.2em;
    color: #232946;
    text-align: right;
}